Dutchman Robert Doornbos will stay on as Red Bull Racing's test and reserve driver for the 2007 season.
Doornbos was the team's third driver during the 2006 season, and he also raced in the final part of the year after Austrian Christian Klien left the outfit.
The Dutch driver admitted recently he was still hopeful of landing a race seat with the Toro Rosso team, but today's news confirm he will continue in his testing role.
"I'm happy and proud to be here," he said. "I had an awesome time within the Red Bull family last year and proved my worth in the three races I was given.
"Next to this I was able to witness the team's boundless ambition and determination to realise their objectives from a close distance.
"No wonder I wanted to be part of the team's plans again in 2007. If the car proves to be just as quick as it looks like, we can look forward to a great year."